This is the first pass at making GetIPConfigs asynchronous.

chromeos/dbus/shill_client_helper.cc

Index: chromeos/dbus/shill_client_helper.cc
diff --git a/chromeos/dbus/shill_client_helper.cc b/chromeos/dbus/shill_client_helper.cc
index f6d0fdce4e394b1af18eb16e3173eb58f764a678..11d965d297414a49e00a8c3f0864a09017b7bb3f 100644
--- a/chromeos/dbus/shill_client_helper.cc
+++ b/chromeos/dbus/shill_client_helper.cc
@@ -277,19 +277,22 @@ void ShillClientHelper::OnDictionaryValueMethod(
     const DictionaryValueCallback& callback,
     dbus::Response* response) {
   if (!response) {
-    base::DictionaryValue result;
-    callback.Run(DBUS_METHOD_CALL_FAILURE, result);
+    scoped_ptr<base::DictionaryValue> result(new base::DictionaryValue);
+    callback.Run(DBUS_METHOD_CALL_FAILURE, result.Pass());
     return;
   }
   dbus::MessageReader reader(response);
-  scoped_ptr<base::Value> value(dbus::PopDataAsValue(&reader));
+  base::Value* value = dbus::PopDataAsValue(&reader);
   base::DictionaryValue* result = NULL;
-  if (!value.get() || !value->GetAsDictionary(&result)) {
-    base::DictionaryValue result;
-    callback.Run(DBUS_METHOD_CALL_FAILURE, result);
+  if (!value || !value->GetAsDictionary(&result)) {
+    delete value;
+    scoped_ptr<base::DictionaryValue> empty_ptr(new base::DictionaryValue);
+    callback.Run(DBUS_METHOD_CALL_FAILURE, empty_ptr.Pass());
     return;
   }
-  callback.Run(DBUS_METHOD_CALL_SUCCESS, *result);
+
+  scoped_ptr<base::DictionaryValue> result_ptr(result);
+  callback.Run(DBUS_METHOD_CALL_SUCCESS, result_ptr.Pass());
 }
 
 void ShillClientHelper::OnVoidMethodWithErrorCallback(
@@ -303,13 +306,15 @@ void ShillClientHelper::OnDictionaryValueMethodWithErrorCallback(
     const ErrorCallback& error_callback,
     dbus::Response* response) {
   dbus::MessageReader reader(response);
-  scoped_ptr<base::Value> value(dbus::PopDataAsValue(&reader));
+  base::Value* value(dbus::PopDataAsValue(&reader));
   base::DictionaryValue* result = NULL;
-  if (!value.get() || !value->GetAsDictionary(&result)) {
+  if (!value || !value->GetAsDictionary(&result)) {
+    delete value;
     error_callback.Run(kInvalidResponseErrorName, kInvalidResponseErrorMessage);
     return;
   }
-  callback.Run(*result);
+  scoped_ptr<base::DictionaryValue> result_ptr(result);
+  callback.Run(result_ptr.Pass());
 }
 
 void ShillClientHelper::OnError(const ErrorCallback& error_callback,